Fitbit data can finally move directly into Apple Health without relying on a separate synchronization app.
Google Health version 5.05 adds the ability to share exercise records, sleep, vital signs, steps and other supported information with Apple’s health platform. The update began appearing on the App Store on August 3.
The change closes a long-standing gap for Fitbit owners using an iPhone. Fitbit devices could connect to the company’s iOS app, but the health and fitness information they collected remained largely isolated from Apple Health.
People who wanted Fitbit steps, sleep sessions or heart-rate measurements inside Apple Health often depended on third-party synchronization services. Some required subscriptions, limited the number of categories available without payment or needed to be opened periodically before new information would transfer.
Google Health now provides that connection itself. Once permission is granted, information recorded through Fitbit hardware can enter the same HealthKit database used by iPhone, Apple Watch and compatible fitness applications.
From Fitbit to Apple Health
Version 5.05 describes the new capability as “Sync to Apple Health.” Google says users can share data including exercise records, sleep, vital signs and steps from Google Health into Apple Health.
The wording represents a reversal of the previous limitation. When Google replaced the Fitbit app with Google Health in May 2026, the iOS version could read information stored in Apple Health. Data collected by an Apple Watch, iPhone or another HealthKit application could contribute to metrics displayed inside Google Health.
The connection did not operate in the other direction. Fitbit measurements stored in Google Health could not be written back to Apple Health, leaving iPhone owners with an incomplete health record.
Version 5.05 adds that missing output. A Fitbit device first synchronizes with Google Health through Bluetooth, after which the Google app can write approved categories into Apple Health.
The transfer remains controlled by the iPhone owner. HealthKit separates read and write permissions and asks for authorization by data category. Someone can permit Google Health to write sleep and exercise information while denying access to another category.
Permissions can also be withdrawn later. Removing access stops future contributions from Google Health without necessarily deleting Fitbit records already written into Apple Health.
Google has not yet published a complete table identifying every category supported for export. The App Store description confirms exercise, sleep, vital signs and steps, while using “and more” for the remaining information.
Likely categories can vary according to the connected Fitbit model and the measurements it records. A basic activity tracker cannot supply data that requires sensors found only in more advanced devices.
Apple Health Becomes More Useful Without Apple Watch
Apple Health has never been limited to Apple Watch. The platform can combine information from iPhone sensors, medical institutions, Bluetooth accessories and third-party applications.
Fitbit’s absence was nevertheless noticeable. The brand has a large population of iPhone users, including people who prefer Fitbit’s sleep tracking, battery life, compact bands or cross-platform compatibility over Apple Watch.
Those owners could view Fitbit information in Google’s application, but other HealthKit apps could not access it directly. A nutrition app might see steps recorded by the iPhone while missing a workout captured by Fitbit. A sleep application could analyze Apple Watch sessions but remain unaware of nights measured by a Fitbit tracker.
Writing Fitbit data into Apple Health makes those records available to other applications when the owner grants permission. One Fitbit workout can contribute to a fitness dashboard, recovery service or health report without requiring a direct integration between Fitbit and every individual developer.
The connection also improves continuity when people change devices. Someone may wear a Fitbit for sleep, use an iPhone during the day and occasionally record a workout with Apple Watch. Apple Health can retain information from each source instead of forcing the person to select one wearable platform for every activity.
That flexibility could be particularly valuable for screenless Fitbit devices designed for continuous tracking. They can collect sleep and vital-sign information while Apple Health provides the longer record and third-party application access on iPhone.
Google benefits from the connection as well. Fitbit becomes easier to recommend to iPhone owners because purchasing the tracker no longer requires abandoning an existing HealthKit history. The hardware can participate in Apple’s health platform while Google Health remains responsible for device management, proprietary analysis and subscription features.
Duplicate Data Requires Attention
Opening both directions between Google Health and Apple Health introduces a possibility that did not exist when information moved only from Apple into Google’s app.
If the iPhone, Apple Watch and Fitbit all record the same period of activity, Apple Health may receive several records for steps, distance, heart rate or exercise. HealthKit stores the source attached to every sample and uses source priority to decide which information should contribute first.
Apple normally gives higher priority to manually entered information, followed by its own devices and then third-party apps or accessories. New data sources can appear near the top of a category’s list, and the order can be changed by the user.
This system is intended to prevent similar records from being counted indiscriminately, but results can differ among applications. A third-party fitness service may process HealthKit samples differently from Apple’s own summary.
Google Health has already encountered duplication issues on iOS. An earlier update corrected cases in which steps were counted twice when Apple Health and Google’s MobileTrack feature were both active.
People using several trackers should inspect the sources contributing to frequently duplicated categories, especially steps and workouts. Apple Health shows the application or device responsible for each entry and allows the source order to be adjusted.
The safest arrangement is usually to let the device actually worn during an activity provide that category. If Fitbit is recording steps throughout the day, allowing the iPhone and another application to generate parallel estimates may add unnecessary records.
Sleep presents a different case. Someone wearing only Fitbit overnight can allow Google Health to supply sleep stages while keeping Apple Watch above it as the preferred source on nights when both devices are worn.
A Major Feature With Incomplete Documentation
The version 5.05 release notes confirm that Google Health can now write information to Apple Health. Google’s support documentation had not completely caught up with the release when the update appeared.
Its Apple Health help page continued to state that Google Health could only read Apple’s data and that writing support would arrive later in 2026. That description reflected the behavior before version 5.05 rather than the capability announced through the App Store.
The documentation delay leaves several details unanswered. Google has not specified how much existing Fitbit history will be exported after the connection is enabled, whether the app backfills older records or whether only newly synchronized information is written.
The company also has not explained the expected transfer frequency. Fitbit devices synchronize with Google Health throughout the day and whenever the app is opened, but writing information into Apple Health may occur on a different schedule.
Proprietary Fitbit measurements may remain inside Google Health. Scores such as Daily Readiness, Cardio Load or Fitbit’s own sleep assessment are calculations rather than standard HealthKit data categories. The underlying sleep, exercise and vital-sign records can be shared even when Google’s derived score cannot.
The update does not turn Apple Health into a replacement for Google Health. Fitbit firmware updates, device settings, coaching, detailed Fitbit analysis and Google Health Premium features continue to depend on Google’s application.
Apple Health instead becomes the common record. It can receive the measurements that Fitbit hardware collects, preserve them beside information from other sources and make approved categories available to compatible iPhone applications.
Version 5.05 also introduces Smart Health Links, allowing Google Health users to create a link for sharing medical records with a healthcare provider or family member. That feature is distinct from Apple Health synchronization and carries its own privacy considerations.
Health information is sensitive regardless of which company’s app stores it. Apple requires separate permission for each HealthKit category, and Google’s application remains subject to its own account, storage and privacy policies. Sharing information with Apple Health creates another authorized copy rather than moving the only record away from Google.
The distinction is worth remembering when disconnecting the services. Revoking permission can stop new Fitbit data from entering Apple Health, but records already transferred may remain until they are removed from Apple’s database.
For years, the App Store’s recommendations around Fitbit were crowded with utilities promising to bridge the gap between Fitbit and Apple Health. Version 5.05 gives the official Google application the connection those utilities existed to provide.
